To the one trying to reclass, this is not and artist CG, it's a full color doujin (it's exactly the same as the monochrome version).
info: Artist CG: Artwork sets without panels, often made digitally. Typically in color and with more detailed backgrounds. Must depict a sequence of events (or be a variant set) AND must be sold / distributed as a whole.
keyword "without panels", which is not the case for this gallery.